drm/nv50: respect LVDS link count from EDID on SPWG panels
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index 75a376c..74a3f68 100644
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -517,13 +517,25 @@
if (bios->fp.if_is_24bit)
script |= 0x0200;
} else {
+ /* determine number of lvds links */
+ if (nv_connector && nv_connector->edid &&
+ nv_connector->dcb->type == DCB_CONNECTOR_LVDS_SPWG) {
+ /* http://www.spwg.org */
+ if (((u8 *)nv_connector->edid)[121] == 2)
+ script |= 0x0100;
+ } else
if (pxclk >= bios->fp.duallink_transition_clk) {
script |= 0x0100;
+ }
+
+ /* determine panel depth */
+ if (script & 0x0100) {
if (bios->fp.strapless_is_24bit & 2)
script |= 0x0200;
- } else
- if (bios->fp.strapless_is_24bit & 1)
- script |= 0x0200;
+ } else {
+ if (bios->fp.strapless_is_24bit & 1)
+ script |= 0x0200;
+ }
if (nv_connector && nv_connector->edid &&
(nv_connector->edid->revision >= 4) &&